Article ID Journal Published Year Pages File Type
177653 Dyes and Pigments 2008 6 Pages PDF
Abstract

The third-order nonlinearity of an organic–inorganic hybrid silica film covalently doped and dispersed with C.I. Disperse Red 1 was studied using the Z-scan technique. The micropores in the sol–gel derived silica matrix were smaller than the dye ligand which led to dye aggregation. A nonlinear refractive index of −3.4 × 10−9 esu and a nonlinear susceptibility of 5.9 × 10−10 esu were recorded at 1064 nm. The large blue shift of the absorption band due to dye aggregation resulted in an enhanced two-photon absorption. The observed nonlinearity is attributable to both two-photon absorption resonance and the refraction change induced by the enlarged π-delocalization conjugation between the dye and the silica matrix.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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